Contents  on 14 March '11

Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

NEOCP Activity  on 14 March '11

The MPC's NEO Confirmation Page has 5 listings: 5 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five updated listings. All of these were "one nighters." So far The Tracking News has counted a total of twelve listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 14 March '11

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-E84 - "22:01 UT" - 2011 EW73


MPEC 2011-E83 - "21:56 UT" - 2011 EV73


MPEC 2011-E82 - "21:50 UT" - 2011 EU73


MPEC 2011-E81 - "15:26 UT" - 2003 SC11


<< DOU on 14 Mar. '11 >>  MPEC 2011-E80 - "07:09 UT" - Daily Orbit Update

Observers  on 14 March '11

Sixteen observers appear in today's MPECs.

CodeObserver / observatory
H17Angel Peaks Obs. in Colorado, 1 in MPEC 2011-E80 -- 2011 BE38
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPEC 2011-E80 -- 2011 EZ40, 2011 EW29, 2011 EU29, 2011 EM51, 2011 ED41, 2011 EC41, 2011 EB7, 2011 EB12, 2011 CG71, 2011 CG2, 2011 AA23
160Castelmartini Obs. in Italy, 13 in MPEC 2011-E80 -- 2011 EU20, 2011 CY46, 2011 BO59, 2009 FY4, 2002 TD60, 2000 EF104, 250614, 215167, 18882, 164400, 163250, 162463, 8566
703Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2011-E80 & 2011-E84 -- 2011 EW73, 2011 ED12, 2011 CY6, 2011 BE38, 2011 BA12, 2008 FU6, 2007 DU103, 2000 EY106, 85953, 53435, 24445, 4401
J95Great Shefford Obs. in England, 4 in MPECs 2011-E80, 2011-E82 & 2011-E84 -- 2011 EW73, 2011 EU73, 2011 EO51, 2011 EE51
704LINEAR in New Mexico, 6 in MPEC 2011-E80 -- 2011 BA12, 2008 FU6, 68359, 256670, 169675, 136874
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2011-E80 & 2011-E82 -- 2011 EU73, 99942
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2011-E80, 2011-E81, 2011-E82 & 2011-E83 -- 2011 EX4, 2011 EV73, 2011 EU73, 2011 BA12, 2003 SC11, 1999 KK1, 152941, 7480
A24New Millennium Obs. in Italy, 16 in MPEC 2011-E80 -- 96590, 85275, 48603, 36284, 23183, 21374, 18882, 175706, 152889, 152563, 137084, 111253, 5496, 4954, 3122, 1864
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-E80 -- 2011 CY46
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2011-E84 -- 2011 EW73
H36Sandlot Obs. in Kansas, 3 in MPEC 2011-E80 -- 2011 EW29, 2011 EK, 2011 ED41
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-E81 -- 2003 SC11
510Siegen Obs. in Germany, 1 in MPEC 2011-E80 -- 2011 ED12
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2011-E80 -- 159635
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2011-E80 & 2011-E82 -- 2011 EU73, 2011 EM40, 2011 EL11, 2011 EG17, 2011 EF17, 2011 EC41, 2011 DU, 2010 LL34
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 March '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2011 EM51JPL Sentry1330R E M O V E DJPL: Risk listing removed at 1149 UTC.
2011 EC41NEODyS13312037-2090114.77e-08-4.36-4.490NEODyS: "Based on 35 optical observations (of which 1 are rejected as outliers) from 2011-03-10.274 to 2011-03-13.496."
JPL Sentry13302053-2095105.3e-08-4.36-4.540JPL: "Analysis based on 34 observations spanning 3.2222 days (2011-Mar-10.27325 to 2011-Mar-13.49543)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
2011 EM40NEODyS13312054-2090188.07e-07-7.51-7.940NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2011-03-10.379 to 2011-03-13.386."
JPL Sentry13302060-2109119.6e-07-7.53-8.150JPL: "Analysis based on 15 observations spanning 3.0065 days (2011-Mar-10.37855 to 2011-Mar-13.38507)." Diameter approximately 0.009 km. from mean, weighted H=27.8.
2011 EU29NEODyS13312029-206722.15e-10-6.94-7.110NEODyS: "Based on 64 optical observations (of which 0 are rejected as outliers) from 2011-03-08.201 to 2011-03-13.145."
JPL Sentry13302029-211047.4e-07-3.73-3.730JPL: "Analysis based on 64 observations spanning 4.9434 days (2011-Mar-08.20041 to 2011-Mar-13.14381)." Diameter approximately 0.380 km. from mean, weighted H=19.8.
2011 EF17NEODyS13312018-204324.02e-09-4.55-4.550NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2011-03-05.249 to 2011-03-14.128."
JPL Sentry13302018-207151.7e-08-3.94-3.970JPL: "Analysis based on 35 observations spanning 8.8794 days (2011-Mar-05.24819 to 2011-Mar-14.12764)." Diameter approximately 0.490 km. from mean, weighted H=19.2.
2011 EL11NEODyS13312078-209022.22e-09-6.16-6.160NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2011-03-04.305 to 2011-03-14.179."
JPL Sentry13302065-2110191.2e-07-4.49-4.880JPL: "Analysis based on 25 observations spanning 9.8741 days (2011-Mar-04.30394 to 2011-Mar-14.17803)." Diameter approximately 0.355 km. from mean, weighted H=19.9.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology  on 14 March '11

Times are UTC for when items were noted or added by The Tracking News.

2305Grabbed MPEC 2011-E84 - 2011 EW73 - see above
2200Grabbed MPEC 2011-E82 - 2011 EU73 - see above
Grabbed MPEC 2011-E83 - 2011 EV73 - see above
1600Grabbed MPEC 2011-E81 - 2003 SC11 - see above
1331Noted that NEODyS has updated its 2011 EC41 risk assessment - see above
Noted that NEODyS has updated its 2011 EF17 risk assessment - see above
Noted that NEODyS has updated its 2011 EL11 risk assessment - see above
Noted that NEODyS has updated its 2011 EM40 risk assessment - see above
Noted that NEODyS has updated its 2011 EU29 risk assessment - see above
1330Noted that JPL Sentry has updated its 2011 EC41 risk assessment - see above
Noted that JPL Sentry has updated its 2011 EF17 risk assessment - see above
Noted that JPL Sentry has updated its 2011 EL11 risk assessment - see above
Noted that JPL Sentry has updated its 2011 EM40 risk assessment - see above
Noted that JPL Sentry has removed 2011 EM51 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 EU29 risk assessment - see above
Grabbed MPEC 2011-E80 - Daily Orbit Update - see above